// const chokidar = require('chokidar')
// const bodyParser = require('body-parser')
// const chalk = require('chalk')
// const path = require('path')
// const Mock = require('mockjs')

// const mockDir = path.join(process.cwd(), 'mock')

// function registerRoutes(app) {
//   let mockLastIndex
//   const { mocks } = require('./index.js')
//   const mocksForServer = mocks.map(route => {
//     return responseFake(route.url, route.type, route.response)
//   })
//   for (const mock of mocksForServer) {
//     app[mock.type](mock.url, mock.response)
//     mockLastIndex = app._router.stack.length
//   }
//   const mockRoutesLength = Object.keys(mocksForServer).length
//   return {
//     mockRoutesLength: mockRoutesLength,
//     mockStartIndex: mockLastIndex - mockRoutesLength
//   }
// }

// function unregisterRoutes() {
//   Object.keys(require.cache).forEach(i => {
//     if (i.includes(mockDir)) {
//       delete require.cache[require.resolve(i)]
//     }
//   })
// }

// // for mock server
// const responseFake = (url, type, respond) => {
//   return {
//     url: new RegExp(`${process.env.VUE_APP_BASE_API}${url}`),
//     type: type || 'get',
//     response(req, res) {
//       console.log('request invoke:' + req.path)
//       res.json(Mock.mock(respond instanceof Function ? respond(req, res) : respond))
//     }
//   }
// }

// module.exports = app => {
//   // parse app.body
//   // https://expressjs.com/en/4x/api.html#req.body
//   app.use(bodyParser.json())
//   app.use(bodyParser.urlencoded({
//     extended: true
//   }))

//   const mockRoutes = registerRoutes(app)
//   var mockRoutesLength = mockRoutes.mockRoutesLength
//   var mockStartIndex = mockRoutes.mockStartIndex

//   // watch files, hot reload mock server
//   chokidar.watch(mockDir, {
//     ignored: /mock-server/,
//     ignoreInitial: true
//   }).on('all', (event, path) => {
//     if (event === 'change' || event === 'add') {
//       try {
//         // remove mock routes stack
//         app._router.stack.splice(mockStartIndex, mockRoutesLength)

//         // clear routes cache
//         unregisterRoutes()

//         const mockRoutes = registerRoutes(app)
//         mockRoutesLength = mockRoutes.mockRoutesLength
//         mockStartIndex = mockRoutes.mockStartIndex

//         console.log(chalk.magentaBright(`\n > Mock Server hot reload success! changed  ${path}`))
//       } catch (error) {
//         console.log(chalk.redBright(error))
//       }
//     }
//   })
// }
